node-load-tester

Simple load testing with Node.js

Summary

A load testing server - v0.5.0

Features

• Basic WebUI
• A new session (new set of cookies) is made per sequence
• Control sequence concurrency with connections
• Control test duration with duration
• Control number of runs with runs
• Set custom headers
• Create a set of baseUrls, randomly choosing a baseUrl to test against
• Create a set of forms, randomly choosing a form to POST with
• Create response expectations based on status code and body contents

Future

• Nice WebUI (Pull Request Anyone?)
  • Dynamic Angular Form to construct a Job object
  • Nice display of results object
• Cancel jobs
• Modify result object to mirror the Request object

Install

$ npm install -g load-tester

Run

$ load-tester <port>
Listening on <port>

Now, you'll find a basic webui at http://localhost:<port>

or you can try the live demo:

Demo

http://node-load-tester.herokuapp.com

Note: free heroku instances have bandwidth caps

Basic Example

We'll target http://echo.jpillora.com, run the following sequence:

• GET / (home) and expect a 200
• Then POST /api/login with creds and expect a 200
• Then confirm that we just logged in (/test/user and check it's 200)
• Then we'll logout
• Finally we'll confirm that we just logged out (/test/user and check it's 404)

<showFile("example/basic.json")>

{
  "baseUrl": "http://echo.jpillora.com",
  "duration": 5000,
  "connections": 1,
  "sequence": [
    { "method": "GET",  "path": "/" },
    { "method": "POST", "path": "/api/login",  "form":{"username":"foo","password":"bar"} },
    { "method": "GET",  "path": "/test/user" },
    { "method": "GET",  "path": "/logout" },
    { "method": "GET",  "path": "/test/user", "expect": { "code": 404 } }
  ]
}

Since http://echo.jpillora.com is just an echo server, it didn't actually login, so the second /test/user still responded with 200, which is seen as a failure:

{
  "paths": {
    "GET /": {
      "pass": 2,
      "fail": 0,
      "total": 2,
      "avgResponseTime": 877
    },
    "POST /api/login": {
      "pass": 2,
      "fail": 0,
      "total": 2,
      "avgResponseTime": 936
    },
    "GET /test/user": {
      "pass": 2,
      "fail": 2,
      "total": 4,
      "avgResponseTime": 692
    },
    "GET /logout": {
      "pass": 2,
      "fail": 0,
      "total": 2,
      "avgResponseTime": 660
    }
  },
  "errors": {
    "expected code: 404 got: 200 (for GET /test/user)": 2
  },
  "pass": 8,
  "fail": 2,
  "total": 10,
  "totalTime": 7719,
  "avgResponseTime": 791
}

API

POST /job

Create a load test Job

Job Object Properties

• baseUrl (String) - Target URL
• baseUrls (Array[String]) - Target URLs
• headers (Object) - Header/Value pairs to apply to all Requests
• runs (Number) - Number of times to run through the sequence
• duration (Number) - Keep running through the sequence for durationms
• connections (Number) - Number of HTTP clients (each will run through the sequence)
• sequence (Array[Request]) - The sequence of Requests to execute (a new cookie jar is created per sequence)

Request Object Properties

• method (String) - HTTP Method to use (default:"GET")
• path (String) - URL Path to be appended to baseUrl
• headers (Object) - Header/Value pairs to apply to this Request (overrides Job headers)
• form (Object) - Object to application/form encode
• forms (Array[Object]) - Round-robin through objects to application/form encode
• expect (Object) - Expectation definition object
  • code (Number) - Expect a particular HTTP status code (default:200)
  • contains (String) - Expect the HTTP body to contain
  • match (String) - Expect the HTTP body to match new RegExp(match)

Note: There must be one expectation

Note: Failed expections are accumulated in the results, e.g:

"errors": {
  "expected code: 404 got: 200 (for GET /test/user)": 2
}

More Examples

Random form data

<showFile("example/random-forms.json")>

{
  "baseUrl": "http://echo.jpillora.com",
  "duration": 5000,
  "connections": 1,
  "sequence": [
    { "method": "POST", "path": "/api/login",  "forms":[
        {"username":"foo","password":"bar"},
        {"username":"ping","password":"pong"},
        {"username":"zap","password":"zoop"}
      ]
    }
  ]
}

More response expectations

<showFile("example/expectations.json")>

{
  "baseUrl": "http://echo.jpillora.com",
  "runs": 3,
  "connections": 1,
  "sequence": [
    { "method": "GET", "path": "/api/code-test",  "expect": { "code": 408 } },
    { "method": "GET", "path": "/api/string-test",  "expect": { "contains": "abc" } },
    { "method": "GET", "path": "/api/regex-test",  "expect": { "match": "^a[Bb]c$" } }
  ]
}

runs is how many times to run the sequence. Can be used with or instead of duration.

Simulate load balancer

Every request will round-robin through the baseUrls

Requests may also specify a header object which will override the job's header object

<showFile("example/load-balancer.json")>

{
  "baseUrls": [
    "http://74.125.237.114",
    "http://74.125.237.115",
    "http://74.125.237.116"
  ],
  "headers": {
    "host": "www.google.com.au"
  },
  "duration": 5000,
  "connections": 1,
  "sequence": [
    { "path": "/" }
  ]
}

<license()>

MIT License

Copyright © 2013 Jaime Pillora <[email protected]>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.